. >> working with top-level sources like that former nsa employee, uncovering government secrets, shooting and producing her films all over the world, laura poitras, the documentarian, she has been busy. she's been doing traveling for her work, for her films, she found she gets stopped a lot at the airport and not anything like what you might get stopped for at the airport for. she's been stopped dozens and dozens of times at the airport. for interrogations that sometimes last for hours. miss poitras started taking extraordinary precautions with her data using encrypted e-mail, working on computers that were not connected to the internet. stashing her notes in safe deposit boxes. she kept on, though, getting stopped at the airport. starting in 2006, she was detained and questioned like that more than 40 times. in april of last year, salon.com wrote about what had been happening to laura poitras as she tried to travel, then finally, finally after that public attention, and that article from salon.com, the airport interrogations of laura poitras stopped. she found, okay, she can get on a pla